So , I've had 6GB of ram on my pc , and I wanted to upgrade , so I bought a 8GB ram card to test if it works before buying another one. I copied the entire text that was written on my 2GB rams (speed etc.) , so that it will be the exact same model just of 8GB , and found the matching item. I put it on my pc and it never worked. Is there something I might have done wrong?